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Mimeo BP, no. 011-16 (no date)

Page 001

Purdue University Mimeo BP-11-16
Agricultural Experiment Station March, 1960
Lafayette, Indiana
1959 PERFORMANCE TRIALS OF
SINGLE CROSSES AND EXPERIMENTAL DOUBLE CROSSES
This publication is the second of a series reporting the performance of single-cross predictive trials and experimental double crosses. The performance tests of all experimentals away from Lafayette are the responsibility of Paul L. Crane, while the single cross tests at Lafayette are the responsibility of A. M. Brunson and L. F. Bauman.
The single-cross test, involving all combinations of 16 early inbred lines, was grown at the Agronomy Farm, Lafayette, and at Pinney-Purdue Farm, Wanatah, At Lafayette, the single crosses of these 16 early inbreds were also included in a larger group of single crosses involving a total of 25 inbreds. The performance of crosses involving the 16 inbreds are reported in both table 1 and table 3 to facilitate comparisons.
The late maturing single-cross group, involving all combinations of 17 inbred lines, was grown in 1959 at the Agronomy Farm, Lafayette. These crosses were also tested in 1958 at Lafayette and Princeton.
EXPERIMENTAL METHODS
Method of Planting: Plot size was 1 x 16 hills for double crosses and 1 x 12
hills for single crosses. Planting rates were 15,190 plants per acre at locations other than Lafayette and 16,840) plants per acre at Lafayette. The plots were not thinned and the resulting stand was about 90 per cent at harvest.
Yield: Acre yields were calculated on the basis of shelled grain containing
15.5 per cent moisture, the maximum allowable for No. 2 corn. All plots were harvested with a one-row picker sheller.
Lodging: Lodging was recorded in October just prior to harvest and includes
both root lodging and stalk breakage. At Lafayette, lodging was also determined in late November on a separate replication which was not harvested for yield.
Silking Date: The silking date gives the number of days from planting until one-half of the plants were in silk.
Ear and Plant Heights: The first ten plants of each plot at Lafayette were
measured in inches and averaged.
Smut Grade: Plots at Lafayette were rated for smut infection, and the grades
were based on ratings from 0 (resistant) to 5 (susceptible).

Purdue University Mimeo BP-11-16
Agricultural Experiment Station March, 1960
Lafayette, Indiana
1959 PERFORMANCE TRIALS OF
SINGLE CROSSES AND EXPERIMENTAL DOUBLE CROSSES
This publication is the second of a series reporting the performance of single-cross predictive trials and experimental double crosses. The performance tests of all experimentals away from Lafayette are the responsibility of Paul L. Crane, while the single cross tests at Lafayette are the responsibility of A. M. Brunson and L. F. Bauman.
The single-cross test, involving all combinations of 16 early inbred lines, was grown at the Agronomy Farm, Lafayette, and at Pinney-Purdue Farm, Wanatah, At Lafayette, the single crosses of these 16 early inbreds were also included in a larger group of single crosses involving a total of 25 inbreds. The performance of crosses involving the 16 inbreds are reported in both table 1 and table 3 to facilitate comparisons.
The late maturing single-cross group, involving all combinations of 17 inbred lines, was grown in 1959 at the Agronomy Farm, Lafayette. These crosses were also tested in 1958 at Lafayette and Princeton.
EXPERIMENTAL METHODS
Method of Planting: Plot size was 1 x 16 hills for double crosses and 1 x 12
hills for single crosses. Planting rates were 15,190 plants per acre at locations other than Lafayette and 16,840) plants per acre at Lafayette. The plots were not thinned and the resulting stand was about 90 per cent at harvest.
Yield: Acre yields were calculated on the basis of shelled grain containing
15.5 per cent moisture, the maximum allowable for No. 2 corn. All plots were harvested with a one-row picker sheller.
Lodging: Lodging was recorded in October just prior to harvest and includes
both root lodging and stalk breakage. At Lafayette, lodging was also determined in late November on a separate replication which was not harvested for yield.
Silking Date: The silking date gives the number of days from planting until one-half of the plants were in silk.
Ear and Plant Heights: The first ten plants of each plot at Lafayette were
measured in inches and averaged.
Smut Grade: Plots at Lafayette were rated for smut infection, and the grades
were based on ratings from 0 (resistant) to 5 (susceptible).